The art world loves hype. Works are touted as the biggest, the rarest, the most expensive.Even in an age of superlatives, the British Museum has something special - the oldest known figurative art in the world.The artworks on display in the new exhibition "Ice Age Art" are so old that many are carved from the tusks of woolly mammoths.But it's not just their age that may surprise visitors. It's their artistry.These are artworks, not just prehistoric artifacts. Some of the sophisticated carvings, sculptures and drawings of people and animals look like something Pablo Picasso or Henry Moore might have created...